Chroma wrote:-Every time you drink a glass of water, the odds are good that you imbibe at least one molecule that passed through the bladder of Oliver Cromwell. It's just elementary probability theory. The number of molecules per glassful is hugely greater then the number of glassfuls in the world. -Dawkins

the same goes for breathing air. With every inhilation, it is highly probable that you are inhaling an atom of Caesars dying breath.

Time Travel is plausible, but not possible, as the time machine would have to have the same density as a neutron star to make an 'impact' in many more dimentions that we can see. If it did have that mass, the world and solar system would collapse.

Doctor Who... I'm on to you...

Also, birds can't travel in space or they'll die of starvation, as they require gravity to eat because they have no swallowing mechanism